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3 years ago

What type of machine is a CD player? simple machine mechanical machine compound machine complex machine

Physics

2 answers:

kow [346]3 years ago

8 0

Answer:

Compound machine

Explanation:

I know this because a compound machine contains several simple machines and that is what a CD Player has. Hope this helps!

spayn [35]3 years ago

7 0

Answer:

COMPLEX

Explanation:

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A + 8 μC charge lies 4 m to the left of a - 10 μC charge. A - 12 μC charge lies 8 m to its right. What is the resultant force on

MaRussiya [10]

Answer:

both side charges will exert force on central charge towards left so the two forces add up. Thus resultant force on centre charge is

F = 9×10^9 x 8×10^-6×10×10^-6/16

9× 10^9 × 10×10^-6×12×10^-6/64

= 9× 10^9 × 10^ -12/16 (80+30)

=6.18 × 10^-2 N

= 0.06 N

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3 years ago

A truck going 15 kmôŹ°€h has a head-on collision with a small car going 30 kmôŹ°€h. Which statement best describes the situation

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1. e) None of the above is necessarily true.

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3 years ago

A basketball player jumps straight up with a speed of 14 m/s. How high did the player jump?

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3 years ago

A gold bar 20.0kg at 35.0°c is placed in a large insulated 0.8kg glass container at 15°c and 2.0kg of water at 25°c.. calculate

Oksanka [162]

Answer:

The final equilibrium temperature is approximately 26.69 °C

Explanation:

The heat transferred, ΔQ, from a hot body to a cold one is given by the following formula;

ΔQ = m·c·ΔT

Where;

m = The mass of the body

c = The specific heat capacity of the body

ΔT = The temperature change of the body

The given mass of the gold bar, m₁ = 20.0 kg

The initial temperature of the gold bar, T₁ = 35.0 °C

The specific heat capacity of gold, c₁ = 0.13 kJ/(kg·K)

The mass of the glass container, m₂ = 0.8 kg

The initial temperature of the glass container, T₂ = 15°C

The specific heat capacity of glass, c₂ = 0.792 kJ/(kg·K)

The mass of the added water, m₃ = 2.0 kg

The initial temperature of the added water, T₃ = 25°C

The specific heat capacity of water, c₃ = 4.2 kJ/(kg·K)

The heat lost by the gold = The heat gained by the glass and the water

Let 'T' represent the temperature at the final equilibrium, we have;

m₁·c₁·ΔT₁ = m₂·c₂·ΔT₂ + m₃·c₃·ΔT₃

Where;

ΔT₁ = T₁ - T

ΔT₂ = T - T₂

ΔT₃ = T - T₃

∴ 20.0 × 0.13 × (35 - T) = 0.8 × 0.792 × (T - 15) + 2.0 × 4.2 × (T - 25)

Expanding and collecting like terms (using a graphing calculator) gives;

91 - 2.6·T = 9.0336·T - 219.504

9.0336·T + 2.6·T = 219.504 + 91 = 310.504

11.6336·T = 310.504

T = 310.504/11.6336 ≈ 26.69

The final equilibrium temperature, T ≈ 26.69 °C.

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3 years ago

Seema knows the mass of basketball. What other information is needed to find the balls potential energy

Lelu [443]

Answer: The height (position) of the ball and the acceleration due gravity

Explanation:

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In the case of the Earth, in which the gravitational field is considered constant, the gravitational potential energy $U$ will be: